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Google Chrome change that weakens ad blockers begins June 3rd
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
I'm not a user of brave, but I did a quick Google and it looks like they're ad blocking will be unaffected. As for other extensions, I think that at least some will be supported for a year, while others may break immediately but I didn't take too deep TBH